Tank cap



' April 18, 1933. E. L. CARNI-:Y 1,903,892

TANK GAP Filed March 21. 1932 l Inventor Patented Apr. 1s, 193s orrlcr.

Application filed latch 21, 1982. Serial No. 800,303.

The present inventionrelates to new and useful improvements inv caps particularly for use on the gasolene tanks ofl automobiles and has for its primary object to pro vide, in a manner as hereinafter set forth, a' cap of this character embodying novel locking means for preventing accidental or unauthorized removal of said cap after the same has been secured in position, thus also preventing the wasteand smell of gasolene from the tank. i

Another very important object of the. in-

vention is to provide agasolene tank cap embodying a novel construction, combination and arrangement of parts through the medium of which damage to thecap by persons who may attempt to force the same open will be prevented.

Other objects of the invention are to provide a gasolene tank cap of the character described which will be simple in construe` tion, strong, durable, eiiicient and 'reliable in use and which may be manufactured at low cost and attached to gasolene tanks in use at present without the necessity of materially altering said tanks.

All of the foregoing and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawing wherein like characters of reference designate corresponding parts throughoutthe several views, and wherein Figure l is a view in vertical section through a cap constructed in accordance with the present invention, showing the same in position on the filling -neck of a tank. g Y

Figure 2 is a top plan view of the cap.

Figure 3 is a top plan view of the tank neck.

Figure 4 is a view in horizontal section, taken substantially on the line 4-'4 of Figure 1.

Referring now vto the drawing in detail, it will be seen that the reference numeral 1 designates a portion of the filling neck of a gasoline tank (not shown), said neck ter- 59 minating, atV its upper end, in the inwardly and 4 downwardly turned anges 2, said l fianges being spaced from each other to Vprovide the openlngs 3. One end portion of each flange 2 is beveled to provide a cam surface for a purpose which will he presently set forth;

The cap is designated generally bythe reference numeral 4 and, of course, 1s engageable on the upper end of the neckv 1.

The cap 4 includes a substantially concavo- 00 l convex outer disk 5 having a rounded marginal fiange 6 and correspondingly shaped mner disk 7 having a rounded marglnal flange Sengaged in the ange 6. The disk` 7 fits snugly within the disk 5. Then, mount- 65 ed in the inner disk 7 is a gasket 9 of suitf able` material, preferably cork, having its periphery en aged in the flange 8 for retainlng said gas et in position. The gasket 9, of course, is engageable directly with the neck. 1 toprovide a leak-,proof joint.

Rigidly secured to the lower side of the inner disk 7 is a cylinder lock 10, the cylinder 11 of which projects rotatably through the `disks 5 ad'7 for receiving a ke 12`. A 75 -'plate A. is detachably securedto t e lower' side of the lock 10 by screws B and has pro- 'jecting therefrom the integral arms 13 for engagement beneath the Hanges 2 of the gasoline tank neck 1, as clearly seen in Figure 1 90 of the drawing. The slidably retractible. bolts 14 of the lock 10 are engageable in the openings 3 to prevent unauthorized rotation of the cap, thus preventing the arms 13- from being disengaged from'beneath the flanges 2. 95

In use, the cap is positioned on top of the neck 1 by passing the arms 13 through the openings 3. The cap is then rotated toengage the arms 13 beneath the anges 2. The

frictional contact between the disks 5 and 7 90 is sufficient toordinarily cause said disks to rotatev in unison, .thereby facilitating the mounting or removal of the cap. The lock is then actuated to engage the bolts 14 inthe openings 3 in which position, should it be at- 95 tempted to rotate the cap, said bolts wouldl engage the ends of the flanges 2, and frustrate the attempt. Should it be attem ted to force rotation of the cap, the outer disk 5 will rotate independently of the mner disk m0 7, thus preventing excessive strain from bei ing transmitted to said inner disk and consequently thelock Iand arms 13. When it is desired to remove the cap by one authorized to do so, the key 12 is inserted and the bolts 14retracted after which the cap may be freely rotated to disengage the arms 13 from beneath the anges 2. Y

.It is believed that the many advantages of a cap constructed in accordance with this invention will `be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope oi the invention as ciaimed.

in the drawing, the arms 13 are shown providedwith upwardly oiiset free end portions, for use on certain automobiles. lThe capmay be expeditiously adapted to fit the tanks of various automobiles y simply removing the plate A and substituting therefor a plate on which the arms 13 are of the necessary shape.

What is claimed is l. A tank cap comprising an inner disk, an outer disk rotatably mounted on the inner disk, means connecting the disks together in frictional Contact with each other, and retainin means on the inner disk engageable with te tank for releasably securing the cap thereon, the first named means including a rounded, peripheral flange on the inner disk, and a rounded peripheral flange on the outer disk enclosing theiirst named flange.

2. A tank cap comprising a substantially concavo-convex inner disk, a rounded flange on the periphery of said inner disk, a substantially concavo-convex outer disk rotatably mounted on the inner disk, a rounded iian e on the periphery of the outer disk enclosing the first named flange, the outer disk being frictionally engaged with the inner disk, a gasket mounted on the inner disk and engageable with the tank, arms mounted on the inner disk and engageable with the tank key actuated lock mounted on the inner disk and engageable with the tank for preventing rotation of the inner disk relative to' said tank, said lock including slidable bolts engageable with the tank and further including a cylinder pro'ecting through the disks for releasably securing the cap thereon, and a key actuated lock mounted on the inner disk and engageable with the tank for preventing rotation of the-inner disk relative tos'aid tank.

'3. A tank cap comprising a substantially concavo-convex inner disk, a rounded iiange on the periphery of said inner disk, a substantially concavo-convex outer disk rotatably mounted on the inner disk, a rounded ange on the periphery of the outer disk enclosing the first named ange, the outer disk being frictionally engaged with the inner disk, a gasketmounted on the inner disk and engageable with the tank, arms mounted on the inner disk and engageable with the tank forv releasably- 'securing the cap thereon, and a 

